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Javascript is a snake, and javascript is a snake.

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Javascript is a snake, and javascript is a snake.

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The idea of writing a snake in javascript

First:
Control variables of the snake movement: speed, direction, length. These three variables are global variables.
Control direction: bind an onkeycode event: www.phpweblog.net/..8.html here, you can find the corresponding keycode of the operation button.
Speed and length: directly change the variable.
Then set the moving interval: use setTimeout (function () {}, 1000); set the function execution interval.
 
Use javascript to write the conversion principle or code of a snake.


Forward, add a header to the end of the snake body array, and turn to the same way.
However, the position of the header is determined by the trigger direction.

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